\version "2.16.1" \include "clementi-op42-mus-L30-scarlatti.ily" % LESSON XXX. Minuetto by Scarlatti. \score { \new PianoStaff << \new Staff = "upper" \LessonXXXUpper \new Staff = "lower" \LessonXXXLower >> \layout { system-count = #4 } }